Central-control cone-drive machine.



R. T. HAZELTON & S. EINSTEIN. CENTRAL CONTROL 00m DRIVE MACHINE.APPLICATION FILE-D SEPT. 11, 1914.

1,126,634. Patentedian. 26,1915.

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CENTRAL CONTROL CONHDRIVE MACHINE. APPLICATION FILED sEFT. 11, 1914.

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Patented Jan. 26, 1915.

UNITED STATES PATENT OFFICE.

ROBERT T. HAZELTON AND SOL EINSTEIN, OF CINCINNATI, OHIO, ASSIGNORS TOTHE CINCINNATI MILLING MACHINE 00., OF CINCINNATI, OHIO, A CORPORATIONOF OHIO.

CENTRAL-CONTROL CONE-DRIVE MACHINE.

Specification of Letters Patent.

Patented Jan. 26, 1915.

To all whom it may concern:

Be it known that we, ROBERT T. HAZEL- TON and SOL EINSTEIN, citizens ofthe United States, and residing at Cincinnati, in the county of Hamiltonand State of Ohio, have invented a new and Improved Central- ControlCone-Drive Machine, of which the following specification is a fulldisclosure.

This invention proposes an improved machine-tool organization and itdeals more especially with machines in which speed variations of thespindle are obtainable, as by means of a direct-acting cone-pulley, andin which the table or carriage 1s propelled through a feed-changemechanism by an appropriate transmission system which initiall'y derivesmotion in direct proportion to the speed of the spindle, and ultimatelytransmits the same through said feed-change mechansm to said table orcarriage. Now. this invention endeavors so to organize the above statedarrangement thatthe feedchange mechanism will be positioned as a unit ongan appropriate frame-unit in close proximity with the under surface ofthe table or of the element providing the table slide, and preferablybelow the path of travel of the table, and provided with one or morecontrol levers mounted on that side of its housing adjacent and withinthe immediate reach of the attendant, whereby he will be enabled togovern the rate of the feed of the table without shifting his position.

Another object within the contemplation of this invention is toformulate an arrangement in which the entire feed-change mechanism willbe mounted on or carried by one or more of the floating frame-units, incooperating relation with a tie) aission that initially derives motionat a rate direatly proportional to the speed of the spindlewand whichtransmits said motion through said feed-change mechanism to enable thetable to be fed at the pro-determined rate.

Other objects will be in part obvious from the annexed drawings and inpart indicated in connection therewith by the following analysis of thisinvention. 7

This invention accordingly consists in the features of construction,combination of parts and in the unique relations of the .uembers and inthe relative proportioning and disposition thereof; all as morecompletely outlihcd herein.

To enable others skilled in the art so fully to comprehend theunderlying features thereof that they may embody the same by thenumerous modifications in structure and relation contemplated by thisinvention, drawings depicting a preferred form have been annexed as apart of this disclosure, and in such drawings, like characters ofreference denote corresponding parts throughout all the views, of whichI Figure 1 is a side-elevation of a milling machine of a knee-and-columncone-driven type and typifying the manner in which this invention may beembodied. Fig. 2 is a diagrammatic drawing, depicting a gear arrangementsuch asmay be used for deriving a series of feeds as well as aquick-traverse of the table; the various gears being brought into oneplaneto avoid the confusion incidental to an ordinary drawing. Fig. 3 isa side-elevation looking to the right of F ig. 1, showing a portion of.the tablefeeding transmission which derives motion from the spindle; andalso showing the quick-traverse pulley which in this instance derivesmotion from the counter-shaft independently of the spindle.

To obtain an adequate understanding'of this invention, it should be keptin mind that the term feed as used herein indicates any one of a seriesof relatively slow movements of the table, such as essentially aresuitable for tooling o erations; and the term feed-change mechanism orfeed changer indicates only that particular organized gear-set whichdetermines the rate at which the table thus feeds, and is to bedistinguished from such'variable-speed devices as may be arranged toeffect changes not identified with the tooling operation, as well asfrom the cone-pulley herein referred to and which determines therate ofrotation of the counter-spindle.

Before detailing the specific feat'ures'of construction whereby thesefunctions are attained it will be convenient first to describe certainmajor elements of a conventional milling machine. These comprise a tableY that supports the Work and which is reciprocated t0-and-fro to subjectthe work bolted thereon to the effect of the tool or cutter that issecured to an appropriate tool-supporting member here typified by aspindle X which, in this instance, is continuously rotated by powerderived from the same between the :lramonnit a ports the spindle ortooleiipporting member and the frame-unit O that directly mounts thetable. In the type of machine illustrated, the inteiponent framc-nnit Bis 601D. nionly'terined a lniee; the table-supper ing frame-unit C isusually tern a saddle, and the spindle mounting iraineaiiii't A isgenerally termed a column W The chief mechanical cha 'acteristic of theinterponent frame-unit B is that it provides for a relative verticaladjustment as to the spindle-n1ounting unit, and a horizontal adjistmeet as to the table-supporting unit, in a direction transverse to theother.

The spindle-mounting frame-unit, or column A, has heretofore been thatalso selectccl to rest on the floor and thus providea foundation for themachine, as a Whole, and it has also been utilized to support or mountboth the change-gear mechanism that varies the speed of the spindle, asWell as the change-gm mechanism that aries the rate of feed of thetaljrle Thim however, has re salted in a very co iiderahlc inconvenienceto the at endant in I1ili1l1i]')l'llltll1 the ma chine. That is to say,the tt imist be stationed at the outer lo gitudh l e of thereciprocating table ill order to :si crntinixe the action. of themachine, hut, 'w en so eta tionech he out o tCll cl the .t'. 'ers thate'll'ect all the chain es of the rate of feed or? the talole so )l'tldl'to malie these changes he mu. 1 his oosition.

This iijn'enlzioii noposes, a long other thiiiigs, a rearr t meet and arecoun tion oi the contioi Ieinents as to I so-called colunm olftheniachioe tron: the n :uhanisn, tlmt caverns the ra at which the tahleshall i A and so hllUOtltt hr com ine it will;

the attencilantj when l mi 'itudinal the rcciproiaiiiii" :trmn tilt)Wail r ,i- {it t" and oitii'rin, will he u hi0, l:

which the table feet social during a cutting v the direction ol travelot the t:

l eithc I to stop the mofien'ieht oil: the iahle either manually ora;itomaticallin in ca me; out

this aspect this invention, one 0." tin: carrying the T ht oil' thetahlc may 3" ine any conveiiti: :al preportior or coilfiguration soon as:11 indicated on. the drawings, but with this d ,tinction that isLittle;

contrived also to sn mart or t ot What may be t i i.

lJOll', to, the cisiiig and ing a cliange-g ear inccha J hex ma i w illWill.

y e. t1 7 is of IWJ'i it more comer one aspects ot tl he obtained bytracin through the machine in descri} ion cf the :atrnct'u'al "mired.

The means for iilllflhill' 'c y the tahe hle dink oh fl new hedes:llJQCl. Tlhii inssioa which iuiic wi Oi as little less oi T .le, to thestation at which the actual mill 5.; begins, lleterrii to Fig. L, .lEL'.dear t is pulley mounted at one side of? the mini fl d" en indepcndcntlyelf the a ineans'ot' belt 1 which in :h

the table,

receives motion from a siitahlc comitcr- 0 shatt, he e .a Oil the illley i jonr naled a suitable hrac or ll( sing; M

mouw il at one side of the coho this alley shaft tGlllllllfllU, in a aWhiv is in turn connected to .r: shai U, the other end of which to a lraclcle coimectcd to the shall 9 "12 i shalt will he ci'aistaiitlydriven at a M 1) 1 1 T .1 to

e. 1c Us. .l is occultd to the at the ehalit l) and 1t co' crates:ahch'l; l (typilyiii t icnal part) which is against as by means oi. a a

wnally retained by a a l which is in turn joi of the hi mount h,

as looeel y' to (Ill'illilkiiil haltfil. screw it 1" anv desired i onthe two l3 -ehanci1t Ely z t :i H ihody- .Hm the ilUlP i1; or yiel thein tia 1nd save H A 3min damaging mic oi: The

- seen i the w th the result t he table at A aoriate tained by geai i,iiiiotion mt the shalt t 1539 through a suitable feed-change mechanismso as to obtain any desired rate of reduced travel corresponding withthe tooling to" be 1 done.

The means instrumental in transmitting motion from the sleeve 10 to thetable may embody a bevel gear 11, which is restrained against axialmovement and meshes with a bevel 12 here shown as secured to a shaft 13,which in turn carries a beveled gear 14 at its upper end and whichmeshes both with the bevel R and the bevel L which are journaled in thetable support C, here instanced as a saddle. Passing through thesebevelgears R and L is a sleeve 1.5 which 'is normally in loose relationwith these bevels, but which is splined to the shaft 16. In, thisembodiment, this shaft-or feed-screw 16 is fixed against translation bymeans of the collars 17, and it is provided with screwthreads 18 meshingwith a nut l9'that is non-rotatably mounted on the table Y so so astotranslate therewith. By this means, thetable will be caused to travel atthe rate determined by the rotation of the screwshaft 16. p Amotion-reverser isv interposed in the transmission extending from 10 to19 and it comprises a clutch-member J which is splined'to the sleeve 15and carries clutchteeth at its ends whereby it may be engaged and, whenit is shifted to teeth on the beveled gears R and L, so that, when theclutch member J is shiftedito the one side, the table will be causedgtotravel 'to the right the other side, the table will be caused to travelto the left. \Vhen this clutch-member is shifted on the sleeve 15 to anintermediate position, no motion at all will be transmitted, and hencethe table will cease to travel.

' The spindle-actuating system may now be described.

At a convenient point on the column A is journaled a spindle X which isrotated at the desired rate of speed by power transmitted through eitherof the steps do, m or m and derived from an appropriate belt P driven inthe usual manner from a COUIltBll-Shflft. This constitutes a drive forthe spindle with corresponding which embodies a speed-change mechanism,

as typified by the cone-pulley.

The table-feed transmission will now be detailed. In the embodimentunder description, this transmission derives its motion directly fromthe spindle (instead of directly from a prime-mover) so as to beactuated in. the first instance at a rate directly proportional to thespeed of the spindle.

- G at a corresponding rate.

This transmi ion in the form here shown includes a s rocket-wheel 1WhlOh'lS dicated on Fig. 3. Secured to the sprocketwheel 3 is a gear 4that meshes with the gear 5 to which in turn is secured the knuckle 6.An extensible shaft 7 connects the knuckle 6 with the knuckle 8, whichlatterminal-member may be considered to be 7 the sleeve 10' which islooselymounted on the shaft 9 and is devised to be shifted thereon so asto be connected on the one hand with the quick-traverse transmission, oron the other hand with the feed-change transmission, as by means ofappropriate clutch-teeth at its respective ends. This sleeve 10 maybeshifted or positioned manually or automatically, as by the mechanismdescribed fully in our co-pending applica tion, Serial #850175, filedJuly 10th, 1914-.

The remainder of. the feed motion transmission, including the gearingenabling the rate of feed-to be varied, willnow be described. In thisembodiment, this transmission-also extends frgm the initialterminal-member 1 to the ultimate terminal-memher 10,.which in thisinstance is shiftable. Splined to shaft (Z are two shiftable gearunitsed and d. The former carries the gears d and gear (1, and the lattercarries the gears d and d", and the purpose of en abling these utilizeone or another of said four gears for propelling or transmittingpurposes. Keyed to a shaft journaled in parallelism with shaft d is aseries of gears D, D D and D which is so arranged that gear a?" may bebrought into mesh with gear 13, and so on. In a suitable manner, motionis rived from one of these five gears. Thus, the gear-unit g carries agear g which may bebrought into mesh with gear D by alati pendent uponthe character of the foregoii internieshing; with the efiect that gear ywhich is fast to the sleeve 9 will directl drive the gear G2 andindirectly the gear The gear gear bearers to be shifted is to and thesleeve 9 constitute terminal niembers, either of which may be broughtinto propelling relation with a gear h which is splined to and.therefore drives the shaft h. This" connection is eliected on the onehand by the clutch-teeth at the end of the sleeve 9 Fixed to the'end ofthe she. 7% is a driving disk-h which carries 2 pin h that projects intoa corresponds cess in the companion disk h and th drives the gear Thepurpose at 43%;;

pin arrangement is to centralize all possibility o1" .t'rziicture on thepin lr 'so asto cause the brealrage to occur in an easily, replaceableelement nice of any undue load. By this construction, a positive drivefor all safe loads is insured, during all tooling c313 erations therebyenabling definite :leeds and effects always to besecilred, while yetavoiding any consequential damageto themachine in the event ofexcessive. loads due either to accident or bad judgment on the part or"the attendant. By combining this positive teed safety devicewit h theabovedescribed impositive quick-traverse safety means, the attcndai'itbecomes able safely to urge the machine to its utmost output from allstnndpoints. ltshould be noted that a primary characteristic thiscombination is that it results in an ellf'e'ct unattainable by m an sol. a single safety means of ordinary construction; that is to say, thiscombination a i'ords a differential effect that correct safety pointsare provided both for the relatively slow, but necessarily pow eril'ulfeed ol' the table, "as well as for the speedier and less resistedquick-traverse oil? the table. in accordance with this in.- vention, thesafety" feed device will. be so constructed. as'to transn'iit apredetermined stre such that the table will be fed against theresistance of sale tooling operations, and yet so as to yield or fail totrans niit oh 1 an undue resistance accrue. For cramp in this instance,the safety teed device will transmit the power neces sary to feed thetable against a resistanee o1 tron'i four to live tons pressure as amaximum. 'lh" vill sullice for the tooling operations. Tin cooperatingsafety cans,

l tliti't'lSOi its oliice during the i of the table is designed to vwrially less stresses so that may be propelled againsta resistonly aboutone'lourtl). or one-fifth alienonentioned, say of one ton, sary forshock-absorbing purpoi yieldable flir momentum. 01' inertiaof the parts.The

in turn permai ently n'icshes h ict ion means in handling the gea Hwhich in this cnil'uiuliinent consti Lit-"3S a terminal member oi. theteed mechanism.

Th t is lo say, the gear H" has .1 may be connectediinal-inoniljier 10,when. and there y canse the nuts l at the :iypropi'iate of at the quikravas the meinlwri-z (Z wl changes to be male, educes t vo other nnu-,x -i ti a... 4,. i with .nse e in introduces two n .ial relation, itwill there hat four tunes two iunio 1. cell 'El i Y be ti to use acomparatively free-acting.

.two, or sixteen different changes of feed are rendered available. Themeans whereby the above-mentioned clutches or their shiftable elementsmay both be moved manually asmay now briefly be explained. Referring tol ig. 1, D indicates one of the: hand-levers fthat extends forwardlyfrom one side ofthe housing C for the change-gears and terminates in ahandgrasp located adjacent the front longitudinal edge of the table soas to be immediately accessible to the attendant when standing at hismost effective Operative station. The shank of this, hand-lever extendsthrough a guide plate 51 that thehousing C and it is pivoted at. 59 torock sleeve 54. that enters the gearcase and t'erminates in a shoe 57whereby the gear :jnnit .65 .may be shifted laterally by swingflinglever up and down when it is in proper 'iosition. The end 52 of thelever I B terminates in teeth which mesh with rock like teeth in theplunger til which extends loosely through the bore of the sleeve iii..The purpose of this is to enable the plun- (31 to be moved in an axialdirection by swinging thele'ver D in. its horizontal plane. The saidmovement of the plunger (31 is utilized to rock a lever 66 about ahorizontal. plane so as to swing the shoe 67 and thereby shift the gearunit (1". This con struetion is in all respects identical with.thatfully relatedand described in our co pending application, Serial#850175, filed July. 10th,, 1914-, and therefore need not here beelaborated, lt will be noted that thisconstruction brings the lever 1)into, the positionoiutnrost convenience a there described and it may whobe noted that the lever ll is enabled to operate the sleeve 10 and theinotion-revcrser J by mecl'ianiz m and connections identical with thatalw tlfully detailed in the said (so-pending ca. and which thereforeneed not here be ree .,la.l'ioratcd.

Having thus revealed this invention, we claim asnew and desire to secureby Letters "Patent of the United States: 1. A machinetoolC(lll'll'll'llllg a spindle; a table positioned tliercunder adapted totranslate transversely to said spindle; fr-a1iic-itlnits for menutine;said spindle and table in said relation, 1d providi .2; a relatiroadjaigtnierit 'betweei'i said lul l0 and vspindle in a directionparallel with the axis ihm at a rate directly proportional to theextends laterally from "J ll. 8

liming L also the weight i.

is being th Sup irzim e-iinits iinsunits ii 11 is d trams-units andadjacent frame-unit hand-operative pair-'5 last-mentioned sleissionconnecting said 11gb mechanism with said spindle id table 11m bepi-opslled at 2i n i -ed mutually by said spindle it ,nd adapted topropel said table (it IZU'GISG i'afie independently of said e mechanism.

ie-tool oi'gunimtimi combinmeans for rotating said spinite; 1i table; afeed-change a inotion-i'evei'ser between spindle; a fiist transmissaidspindle. and said table 1 tinge transmission and 1 I a second'Clfill'lSmlESlO-Il 1 independently of said spinsz isd to said filSi]tirmisniisid motion lQVQl'SGl and said and shunting ,nism to impart aquickd sable at a rate indpendeni;

e; ieedrclmn a mechanism; and ame 05 available iilRIlSflllS- able gmoaioii lllClGlJBKlflQi ly oi. sand "Cu disconnect said second 1:. "toestablish :1 mechanical Ween said spindle and sai; 51 st transmissionWhereise said sable t-u feed at a rate unlined 03* said feed-changemechanism. in w less WlliHQ'O'f, We liei'eun'io subscribe our names asattested by the twosubscribiiig Witnesses.

EQBERT T. HAZELTON. SOL EINSTEIN. Witnesses CARY, his.

1-1126 11%, nzmism; a shifting

